return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2S2 (Disulfane)

using model chemistry: PBEPBEultrafine/cc-pV(T+d)Z

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBEultrafine/cc-pV(T+d)Z
 hartrees
Energy at 0K-797.279867
Energy at 298.15K-797.281955
HF Energy-797.279867
Nuclear repulsion energy84.645165
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at PBEPBEultrafine/cc-pV(T+d)Z
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 2552 2552 2.28      
2 A 864 864 0.01      
3 A 504 504 0.17      
4 A 451 451 12.30      
5 B 2556 2556 8.06      
6 B 865 865 7.77      

Unscaled Zero Point Vibrational Energy (zpe) 3895.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3895.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/cc-pV(T+d)Z
ABC
4.81657 0.23063 0.23057

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pV(T+d)Z

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.033 -0.055
S2 0.000 -1.033 -0.055
H3 0.956 1.239 0.888
H4 -0.956 -1.239 0.888

Atom - Atom Distances (Å)
  S1 S2 H3 H4
S12.06521.35892.6386
S22.06522.63861.3589
H31.35892.63863.1293
H42.63861.35893.1293

picture of Disulfane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 H4 98.716 S2 S1 H3 98.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pV(T+d)Z Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.101      
2 S -0.101      
3 H 0.101      
4 H 0.101      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.179 1.179
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.741 2.001 0.000
y 2.001 -25.841 0.000
z 0.000 0.000 -26.971
Traceless
 xyz
x -0.335 2.001 0.000
y 2.001 1.015 0.000
z 0.000 0.000 -0.680
Polar
3z2-r2-1.360
x2-y2-0.900
xy2.001
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.517 0.439 0.000
y 0.439 7.602 0.000
z 0.000 0.000 4.473


<r2> (average value of r2) Å2
<r2> 57.254
(<r2>)1/2 7.567